For the second year in a row, a mother in the US has led a worldwide attempt to break the Guinness World Record for most people simultaneously blowing bubbles in multiple locations.

Isabelle Mosca, of Ventnor in New Jersey, had volunteers in 114 locations nationwide and as far away as Australia, the Dominican Republic and Puerto Rico - but it will be several weeks before they know if they broke the 34,529 record set in England in 2007.

Ms Mosca's 13-year-old son Kyle is autistic and loves blowing bubbles. That led her to use bubble-blowing as a way to raise money and awareness for autism research.

Thousands participated last year, but people at many events failed to properly document their participation as required by Guinness World Records. This time she took no chances, with detailed paperwork required.